Declare properties in .h interface or in an extension in .m file?

Question

In Objective-C, is it best practice to:

1. Declare objects such as buttons in the .h and then synthesize in the .m

   .h
   @interface SomeViewCo         
   
   
           

Answer 1

First, as of Xcode 4.4 there is no longer a need to @synthesize(unless you change both the setter and getter method), either when the @property is declared in the @interface or @implementation.

If the @property is only accessed from within the class then declare the @property in a class extension in the .m file. This provides encapsulation and make it easy to see that the @property is not used from another class.

If the @property is used by other classes, by design, then define it in the @interface in the .h file.